Discuss describes typical conversation in which you can present your ideas in peace. Argue means speak to someone but being angry with him. So argue could be some kind of discussion but in bad atmosphere.

rob means steal but often using violence: The terrorists financed themselves by robbing banks. steal is more general and means to take smth without permission: The number of cars which are stolen every year has risen.

If you rent smth you pay for it regularly. Hire means to pay for smth for a short period.

Additionally if someting is changing position from lover to higher for itself then you should use rise eg. The balloon rose gently (up) into the air. At 6 am we watched the sun rise But if you describe that smth changed its position from lover to higer since sb use his eg. hands than you should use raise. He raised the window and leaned out. However, the main difference is that "rise" is intransitive and "raise" is transitive. If the verb is transitive it means that it must be followed by the noun. If the verb is intrasitive it is not possible to it in passive voice.